Question

x+y =9 or xy=12 Ho toh x3 +y3 ka kya maan hoga​

Answer 1

we know that X + y whole square is equals to X square + y square - 2 X y and we know that X + y is equals to 9 and x y is equals to 12 after substituting we will get x square + y square is equals to 57. x³+y³ has a factor of (x+y)(x²-xy+y²) and we know that x²+y²=57 and 57-12= 45 and x+y= 9 and so x³+y³=9×45= 405